Offline GPS - Jordan map (Amman)

I have an Android smartphone, on which I use Google Maps. Since I will not have a data connection in Jordan (way to expensive for what it is), I am searching for a GPS app that can navigate me using offline (preloaded) maps.

A lot of those apps are available, but I know of none that offer the Jordan map. If anyone can tell me an application that allows me to download a map of that region, I will be very grateful. I don't mind paying for the app or map.